Receptacle



Nov. 8, 1927. 1,648,805 M. GUETT RECEPTACLE Filed June 5, 1924 4 /O :a mi -4 v l 15 I ggg Patented Nov. 19.2.

UNITED STATES PATENT OFFICE.

MONROE GUETT, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE HART & I-IEGEMAN MANUFACTURING COMIANY, OF HARTFORD, CONNECTICUT, A COBPORATIONV OF CONNECTICUT.

RECEIETACLE.

Application led .Tune `5, 1924. Serial No. 718,105.

My invention relates to certain improve ments in receptacles for fuse plugs, or elec tric lamps. I

The object ot the invention is to provide a receptacle having a standard shell, in which can be permanently secured a shell of less diameter to accommodate 'fuse plugs, and, in some instances, lamps having bases smaller than the standard size.

In the accompanying drawings:

Fig. 1 is a face view of a receptacle ci' the ordinary type;

Fig. 2 is a sectional view on the line 2 2, Fig. 1; n

Fig. 3 isa sectional view showing the shell ot less diameter inserted in the receptacle;

Fig. 4 is a sectional view on the line 4-4, Fig. 3; v

Fig. 5 is a detached perspective view of the inner shell and the intermediate locking member; and

Fig. 6 is a perspective view showing the locking member on the innerk shell.

Referring to the drawings, 1 is the insulated body of the receptacle having a deep flange 2, which is cutaway at 3 to receive the terminal 4 of the ordinary construction. The base of the insulated body is recessed at the opposite side for the reception of the other terminal 5, which extends through a slot 6 in the body and into a recess 7 at the back of the body. The terminal, in the present instance, is threaded for the reception of the contact screw 8.

lVhen the parts are assembled, the recess at the back is closed by any suitable nonconducting material 9. Within the flange 2l of the body portion is a threaded metallic shell 10, which is Jformed as shown in Fig. 5, and is cut out at the base in the ordinary manner to receive the plate 11 ot the terminal 4. Between the head ot the Contact screw and the plate 11 is a non-conducting disk 12.

The construction hereinbei'ore described, is one form ci receptacle used for the receptacles of fuse plugs for lamps.

Prior to my invention, when it was desired to change the diameter of the screw threaded shell, it was necessary to remove the shell 10, and its parts, and to insert another shell, or to provide an entire receptacle having a shell of less diameter.

Referring to Fig. 3, 13 designates a shell of less diameter than the shell 10, and hav ing a screw thread formed thereon. Between the two shells is a locking member 14, which consists ot a coiled spring wire having a hook 15 at one end that extends into a hole 16 in the inner shell 13. The opposite end ot the wire is free. When it is desired to reduce the diameter of a receptacle, the coiled wire locking member 14 is screwed onto the shell 13, as shown in Fig. 6. The hook 15 of the locking member enters the hole 16 so as to lock the inner end of the spring locking member to the shell. Then the shell 13, with the locking member thereon, is screwed into the shell 10. The coil yields under pressure so that it will enter the outer shell 10. "When the inner shell is screwed in to its full extent, it cannot be turned in the reverse direction, as, the moment pressure is applied, the spring locking member expands and holds the inner shell firmly in a fixed position. The locking member may be modified without departing from the essential features ot the invention, which is to lock the shell of less diameter to the outer shell so that it cannot be removed maliciously.

The invention hereinbei'ore described is especially designed for reducing the openings -in the receptacles that have been installed. The inner shell and the spiral retaining devices are made as articles of manufacture and are sold independently of the receptacles in order that an electrician can screw the shell, and its retaining device, in the standard shell of a receptacle so that, when the shell of reduced diameter is in place, it cannot be removed.

This construction obviates the necessity of removing one receptacle having a shell of a given size and replacing it with another receptacle having a shell of less diameter to accommodate fuse plugs having less amperage than the standard plugs.

I claim:

1. The combination in a reducing device tor receptacles, of a receptacle having a threaded shell, and a second shell within the shell of the receptacle, said inner shell having a Vscrew-thread adapted to receive a helical spring on the outside and to receive a plug on the inside; and a helical spring located in the groove of the thread on the mounted on the outside of Said inner shell outside of seid inner shell and atteched to and fitting the thread thereon and the thread 10 seid inner shell. of the receptacle shell, seid spring being 2. The combination in a reducing device attached at one end to the inneil shell, the

i? for electric receptacles, of a receptacle hafvinternal thread of said inner shell being ing a threaded shell therein; a second shell arranged to receive ay plug. v having its Wall Shaped to form an inne` and f n v u an outer screw-thread; and a helical spring MONROE GUETT. 

